A little test of mimeTeX…. [latex]e^{pi i}+1=0[/latex] Here we have a commuting diagram in Tex: [latex]Largebegin{array}{rccclBCB} &f&longr[75]^{alpha:{normalsize frightar~g}}&g\largegamma&longd[50]&&longd[50]&largegamma\&u&longr[75]_beta&vend{array}[/latex]